Investigation on the Oxidation Mechanism of Cobalt Hydroxide to Cobalt Oxyhydroxide
Investigation on the Oxidation Mechanism of Cobalt Hydroxide to Cobalt Oxyhydroxide
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DOI：
10.1021/ie901714v
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发表时间：
2010-01
影响因子：
4.2
通讯作者：
T. N. Ramesh
中科院分区：
文献类型：
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作者：
T. N. Ramesh
氢氧化钴和氧化钴的晶体结构来源于水镁石矿物。氢氧化钴为六方1H多型结晶，而氢氧化钴为菱形对称结晶。尽管氢氧化钴和氢氧化氧之间存在等结构关系，但我们观察到它们的对称性不同。六边形和菱形多型通过一个简单的平移向量相互关联。交流层相互平移（1/3,2/3,1）和（2/3,1/3,1）产生3R多型。对羟基氧化钴的x射线粉末衍射（PXRD）图进行了仔细的评估，发现其准确的层序为AC - CB - BA。报道了氢氧化钴向氢氧化钴的结构转变。
Cobalt hydroxide and cobalt oxyhydroxide derive their crystal structure from brucite mineral. Cobalt hydroxide crystallizes in hexagonal 1H polytype while cobalt oxyhydroxide in rhombohedral symmetry. In spite of the isostructural relationship between cobalt hydroxide and oxyhydroxide, we observe different symmetries. Hexagonal and rhombohedral polytypes are related to each other by a simple translation vector. Translation of AC layers by (1/3, 2/3, 1) and (2/3, 1/3, 1) with respect to each other generates the 3R polytype. Careful evaluation of the X-ray powder diffraction (PXRD) patterns of cobalt oxyhydroxide reveals the exact stacking sequence to be AC CB BA. The structural transformation of cobalt hydroxide to cobalt oxyhydroxide is reported.